1. UK ILC Tracker Meeting Oxford 15 April 2015

2. Liverpool activities HV-CMOS Sensor development in HV-CMOS, benefitting from 2 year PRD grant (Matthew Buckland, Gianluigi Casse, Eva Vilella Figueras, Joost Vossebeld) Design, test and prototype sensors for a very-low mass pixel tracker. Collaboration CERN CLICpix group to develop HV-CMOS for their 65nm CLICPix ASIC. (CERN-L’pool student M. Buckland). Signed CLICdp Memorandum of Collaboration this year. Engineering run submissions with dedicated LC devices (AMS and Lfoundry) in summer and autumn 2015. Liverpool/KIT co-designed Institute lead (GC) on AIDA2020 HV-CMOS hybridisation work package

3. Liverpool plans/proposal ILC mechanics Work on low mass tracker mechanics (Tim Jones, Peter Sutcliff, Joost Vossebeld) Invest some design effort towards conceptual design Key challenge for the proposed ILC trackers is the low mass requirement in combination with large physical sizes: SID ILD Simulation work needed to determine requirements on “as-built” alignment accuracy and stability. Lower track density will presumably make in-situ alignment harder. Open volume air cooling requires little mass but may be challenging for large volume tracker: Vibrations due to high air velocity requirement Proposal to study of a few mechanical solutions to establish mass-stability- cooling performance: Solutions with some form integrated airflow distribution Boxed sections (relatively stiff and possibility of restricted air volumes T- bars or cylinders with in-built air channels

4. Possible UK targets for mechanics studies 1.Simulations to establish requirements in terms of Placement accuracy and stability (I) 2.Survey of sensor technologies to establish power requirements Consider different scenarios (intregrating over part of bunch train, single bc resolution,..) 3.Survey of thermo-mechanical solutions and studies of cooling performance in light of conclusions points 1 and 2 4.The above could lead into a conceptual mechanical proposal on which we could do some further work. FEA simulation and small dedicated prototyping for mechanical and thermal studies 4